Sputtering of Single-Crystal Copper and Aluminum with 20–600 eV Argon Ions

Abstract
Absolute measurement of the sputtering yield of (100) and (111) copper and of (111) aluminum single‐crystal targets bombarded with 20–600 eV argon ions was performed employing a sensitive quartz micro‐balance in an ultrahigh‐vacuum system. The threshold energies for copper and aluminum targets were less than 20 eV. The sputtering yield values in the threshold region were dependent upon the detailed nature of the target surfaces. The threshold region orientation dependence of the sputtering yield for copper was different from that in the higher energy regions.

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